Upper Mattagami

Ontario Power Generation (OPG) awarded Kiewit-Alarie, a Partnership (KAP), the Design-Build contract for the redevelopment of the Wawaitin, Sandy Falls and Lower Sturgeon hydroelectric Generating Stations (GS), on the Upper Mattagami River and the Hound Chute GS on the Montreal River. These run-of-river facilities have reached the end of their service life. 

KAP’s bold and innovative solutions provided the best use of the water resource on behalf of OPG. The KAP proposal minimized the environmental “footprint” of the project and accordingly, the risks to the environment. Safety will be at the forefront of this redevelopment project while at the same time exceeding the requirements of Quality by performing the work “right the first time."

Wawaitin GS - KAP will install two Francis units with a total capacity of 15.8 MW in a new powerhouse on a new site located to the west of the existing plant, providing an incremental increase of 5.4 MW of power at this location.

Sandy Falls GS- KAP will install a single 5.6 MW “Saxo” unit together with a powerhouse/dam structure and integral intake, located upstream of the existing facilities, providing an incremental 2.6 MW of power at this location.

Lower Sturgeon GS - KAP will install two “Saxo” units with a total capacity of 14.6 MW, in a new powerhouse to be constructed at the existing location providing an incremental 9.3 MW of power at this site.

Hound Chute GS - KAP will install two “Saxo” units with a total capacity of 10.0 MW, in a new powerhouse to be situated to the east of the existing facility for an incremental 6.4 MW of power at this location.